Pulsed infrared laser treatment of psoriasis
US5527350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1993 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Feb 24, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/0659
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for treating psoriasis with pulsed infrared laser illumination. A pulsed infrared diode laser having a wavelength of 800 nm and a pulse duration in the millisecond range selectively destroys abnormal blood vessels beneath psoriatic plaques at depths of up to one millimeter. Areas of approximately 0.5 cm.sup.2 are sequentially treated. Uniform illumination intensity at a wide range of penetration depths allows selective destruction of the blood vessels without damage to the surrounding tissue, causing the psoriatic lesions to heal. The method may be applied more generally to the treatment of other dermal vascular malformations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.